Spending investor money on marketing should be done strategically to maximize the return on investment and achieve the desired business goals. Here's a step-by-step guide on how to spend investor money on marketing and how to pay them back:

1. **Marketing Strategy and Budgeting:**
   - Develop a comprehensive marketing strategy that aligns with your business objectives and target audience.
   - Determine the marketing channels and tactics that will best reach and engage your potential customers.
   - Set a marketing budget that outlines how much you plan to spend on each marketing activity.

2. **Brand Identity and Collateral:**
   - Invest in building a strong brand identity that represents your company's values and offerings.
   - Design and produce marketing collateral such as brochures, business cards, and branded materials to create a professional image.

3. **Website and Online Presence:**
   - Develop a user-friendly and visually appealing website that showcases your products or services.
   - Invest in search engine optimization (SEO) to improve your website's visibility on search engines and drive organic traffic.

4. **Content Marketing:**
   - Create high-quality and valuable content such as blog posts, articles, videos, and infographics to attract and engage your target audience.
   - Distribute your content through various channels, including social media, email marketing, and industry publications.

5. **Digital Advertising:**
   - Consider allocating a portion of the budget to digital advertising platforms like Google Ads, Facebook Ads, and LinkedIn Ads to reach a wider audience and drive targeted traffic to your website.

6. **Social Media Marketing:**
   - Use social media platforms to build brand awareness, engage with your audience, and promote your products or services.
   - Invest in sponsored posts and social media advertising to expand your reach.

7. **Influencer Marketing:**
   - Collaborate with influencers or industry leaders who have a significant following in your niche to promote your brand and products.

8. **Email Marketing:**
   - Build an email list and implement email marketing campaigns to nurture leads and keep customers informed about your offerings and promotions.

9. **Measure and Analyze Results:**
   - Use analytics tools to track the performance of your marketing efforts.
   - Measure key performance indicators (KPIs) such as website traffic, conversion rates, and customer acquisition cost.

10. **Paying Back Investors:**
    - To pay back investors, you need to generate revenue and profit from your business activities.
    - As your marketing efforts contribute to increased sales and business growth, the company's value will rise.
    - You can pay back investors through dividends, distributions, or by selling their shares at a higher valuation in the future.

11. **Return on Investment (ROI):**
    - Regularly assess the ROI of your marketing campaigns to ensure that the money spent is generating a positive return.
    - Adjust your marketing strategy based on the performance data to optimize future spending.

It's essential to be transparent and communicate with investors about the progress of your marketing initiatives and overall business performance. Keeping them informed about how their investment is being utilized and the results achieved will build trust and confidence in your business.